Recent Development and Future Perspectives of High Entropy Alloys for Catalysts

Abstract

High entropy alloys (HEAs) are composed of five or more metal elements with similar proportions. Due to the electronic structure among metal elements, they have abundant active sites and have good catalytic activity and stability as materials. Therefore, they have great promise in electrochemical energy storage and electrocatalysis. This paper reviews the preparation and characterization methods of HEAs, and the applications of HEAs in catalysis, especially the contribution in lithium‐sulfur batteries, but also in Electrolyzed water and other energy storage materials. The challenges of HEAs in catalysis and their future developments are also presented.

Optimization strategies of high-entropy alloys for electrocatalytic applications

“…136 Electrocatalytic HER, HOR, OER, ORR, CO 2 RR, NRR and AOR involve multi-step reactions, and the uniform distribution of multiple active sites on the surface of the catalyst can break the limitation of interdependence, which is beneficial to adjust the binding energy and improve the catalytic activity. 137,138…”

Recent advances and understanding of high-entropy materials for lithium-ion batteries

“…High-entropy alloys (HEAs), an emerging class of alloys with single-phase solid solution structure, are first introduced by Yeh and Cantor et al in 2004 [18,19]. HEAs are composed of at least five metal elements with similar or a molar ratio of 5 ∼ 35% of each element, or defined as alloys with configurational entropy (ΔS mix ), which is defined as the degree of disorder of a system, greater than 1.5 R [20][21][22].…”